2000 Ford Explorer overdrive lite in dash is blinking

need to have it scanned for codes
that is tranny codes


this is TSB on the subject


ISSUE
Some vehicles may exhibit a flashing Transmission Control Indicator Lamp (TCIL) accompanied by a Diagnostic Trouble Code (DTC) P0741 and in some cases P1728. This may be caused by the Output Shaft Speed Sensor (OSS) signal being improperly processed by the Powertrain Control Module (PCM).
ACTION
Retrieve DTCs. Verify DTC P0741 and in some cases P1728. Diagnose and reprogram the PCM if necessary. Refer to the following Service Procedure for details.
SERVICE PROCEDURE
1.Verify transmission fluid levels (and transfer case level if equipped).
2.Verify that DTC P0741 and in some cases P1728 are present. If other DTCs are present, repair them first. 3.Follow the Output State Control (OSC) procedures for both bench and drive modes as listed in the appropriate model year Workshop Manual (Section 307-1A) to verify transmission and solenoid operation. While in OSC drive mode, monitor OSS Sensor - OSS PID for proper signal as stated in the Workshop Manual. This will verify OSS operation. If the solenoids or transmission fail to perform properly, follow normal diagnosis and repair procedures.
4.Reprogram the PCM following the procedures found in the Powertrain Control/Emissions Diagnosis (PC/ED) Workshop Manual..
5.Verify the repair following the Transmission Drive Cycle test as written in the appropriate

NOTE: THE TRANSMISSION DRIVE CYCLE TEST MUST BE PERFORMED EXACTLY AS WRITTEN. DO NOT SHORT CUT OR MISS ANY STEPS OR THE PROCEDURE WILL NOT BE ABLE TO VALIDATE THE REPAIR.

I had the codes checked but they told me there was no codes but the light was not on at the time
Fred

codes should be stored in the TCM and PCM memory
check for history codes
you may need a scanner and Not an OBDII reader

[quote:eeb33e9975="BMRFIXIT"]codes should be stored in the TCM and PCM memory
check for history codes
you may need a scanner and Not an OBDII reader[/quote:eeb33e9975]
I am going to take it to have the trans codes done again see what happens this time I will let you no

let me know what you come up with

[quote:bd563c4ca8="BMRFIXIT"]let me know what you come up with[/quote:bd563c4ca8]
I had it tested today it came up with p0741 code
torque converter solenoid stuck in off position. now in your email you said that this code could mean the output shaft speed sencor could be bad that is if I am understanding you right so now I am not sure witch one to replace?
torque converter solenoid? or speed sencor?
thanks Fred

replace 1st Output Shaft Speed Sensor
left rear of tranny

[quote:1dd8bc1549="BMRFIXIT"]replace 1st Output Shaft Speed Sensor
left rear of tranny[/quote:1dd8bc1549]
thanks is that a dealer item? will get one let you heys no how it works thanks for the help
Fred

went to the dealer today got the sensor came home got under the truck and they sold me the wrong one this one looks something like the older ones with the cable drive on the inside part and 2 wire plug on the outside think this one they sold me is 4 a 2 wheel drive maybe? not sure going to take it back .now the one I need is the one on the left rear side on the very top of the trans? pretty sure it is just checking thanks guys will let you no how it works
Fred

[well changed the speed sensor today its still doing same thing ]so now what?
Fred

is it still coming up with code
consider reprogramming the PCM
talk to your local dealer
have your VIN # on hand